#include<iostream>
#include<vector>

template<typename T1,typename T2=int>
void func(T1 a,T2 b)
{
    std::cout<<a<<" "<<b<<std::endl;
}

int main()
{
    std::vector<std::vector<int> >v;
    func<double>(1.3,2);
    return 0;
}